Question 1

An organ or group of cells that responds to a motor neuron is a/an:

Accepted Answer

A)  effector. 
B)  receptor. 
C)  glial cell. 
D)  sensory organ. 
A)  effector. 
B)  receptor. 
C)  glial cell. 
D)  sensory organ. A

Question 2

A section of a neuron's membrane becomes temporarily positive on the inside when:

Accepted Answer

A)  ion channels open and sodium ions rush in. 
B)  ion channels open and potassium ions rush in. 
C)  negatively charged proteins exit the cell. 
D)  neurotransmitters enter the cell. 
A)  ion channels open and sodium ions rush in. 
B)  ion channels open and potassium ions rush in. 
C)  negatively charged proteins exit the cell. 
D)  neurotransmitters enter the cell. A

Question 3

In a reflex such as the "knee jerk" or patellar reflex, the efferent signal travels through the:

Accepted Answer

A)  spinal cord. 
B)  motor neuron. 
C)  sensory neuron. 
D)  interneuron. 
A)  spinal cord. 
B)  motor neuron. 
C)  sensory neuron. 
D)  interneuron. B

Question 4

When a neuron is at its "resting potential," which of the following is true about the concentration of sodium ions?

Accepted Answer

A)  Sodium ions have a greater concentration inside the neuron's cell membrane. 
B)  Sodium ions have a greater concentration outside the neuron's cell membrane. 
C)  The sodium concentration is the same outside and inside the neuron's cell membrane. 
A)  Sodium ions have a greater concentration inside the neuron's cell membrane. 
B)  Sodium ions have a greater concentration outside the neuron's cell membrane. 
C)  The sodium concentration is the same outside and inside the neuron's cell membrane.

Question 5

The portion of the nervous system that most directly controls skeletal muscles is the:

Accepted Answer

A)  somatic. 
B)  autonomic. 
C)  sympathetic. 
D)  parasympathetic. 
E)  afferent. 
A)  somatic. 
B)  autonomic. 
C)  sympathetic. 
D)  parasympathetic. 
E)  afferent.

Question 6

The parts of the central nervous system are the:

Accepted Answer

A)  afferent and efferent. 
B)  nerves and receptors. 
C)  brain and spinal cord. 
D)  autonomic and somatic. 
A)  afferent and efferent. 
B)  nerves and receptors. 
C)  brain and spinal cord. 
D)  autonomic and somatic.

Question 7

Which of the following does the central nervous system use for the action of pulling your hand away from a hot object?

Accepted Answer

A)  receptors 
B)  sensory neurons 
C)  motor neurons 
D)  glial cells 
A)  receptors 
B)  sensory neurons 
C)  motor neurons 
D)  glial cells

Question 8

Any collection of nerve cell bodies in the PNS is called a:

Accepted Answer

A)  ganglion. 
B)  afferent nerve. 
C)  efferent nerve. 
D)  dendrite. 
A)  ganglion. 
B)  afferent nerve. 
C)  efferent nerve. 
D)  dendrite.

Question 9

Which of the following would send a signal to the central nervous system that you had touched a hot object?

Accepted Answer

A)  motor neuron 
B)  sensory neuron 
C)  interneuron 
D)  glial cell 
A)  motor neuron 
B)  sensory neuron 
C)  interneuron 
D)  glial cell

Question 10

Part of the reason for the charge difference inside and outside a neuron's membrane is:

Accepted Answer

A)  excess potassium outside the membrane. 
B)  excess sodium inside the membrane. 
C)  negatively charged proteins inside the membrane. 
D)  positively charged proteins inside the membrane. 
E)  positively charged proteins outside the membrane. 
A)  excess potassium outside the membrane. 
B)  excess sodium inside the membrane. 
C)  negatively charged proteins inside the membrane. 
D)  positively charged proteins inside the membrane. 
E)  positively charged proteins outside the membrane.

Question 11

Inrushing sodium ions trigger the opening of nearby channels and movement of sodium inward at that neighboring section of the membrane. What is occurring?

Accepted Answer

A)  normal resting potential 
B)  an action potential 
C)  neurotransmitter release 
D)  protein movement 
A)  normal resting potential 
B)  an action potential 
C)  neurotransmitter release 
D)  protein movement

Question 12

Nerves would be best described as:

Accepted Answer

A)  collections of motor neuron dendrites and cell bodies. 
B)  collections of sensory neuron dendrites and cell bodies. 
C)  bundles of dendrites in the peripheral nervous system (PNS). 
D)  bundles of axons in the peripheral nervous system (PNS). 
A)  collections of motor neuron dendrites and cell bodies. 
B)  collections of sensory neuron dendrites and cell bodies. 
C)  bundles of dendrites in the peripheral nervous system (PNS). 
D)  bundles of axons in the peripheral nervous system (PNS).

Question 13

White matter areas of the nervous system mostly contain:

Accepted Answer

A)  neuron cell bodies. 
B)  myelinated axons. 
C)  cerebrospinal fluid. 
D)  ganglia. 
A)  neuron cell bodies. 
B)  myelinated axons. 
C)  cerebrospinal fluid. 
D)  ganglia.

Question 14

A drug that causes potassium to leak out of the neuron would:

Accepted Answer

A)  make it harder to trigger action potentials in the neuron. 
B)  cause the inside of the neuron to become more positive. 
C)  cause the outside of the neuron to become more negative. 
D)  make it easier to trigger action potentials in the neuron. 
A)  make it harder to trigger action potentials in the neuron. 
B)  cause the inside of the neuron to become more positive. 
C)  cause the outside of the neuron to become more negative. 
D)  make it easier to trigger action potentials in the neuron.

Question 15

Which statement best describes how one neuron stimulates another?

Accepted Answer

A)  Sodium ions jump across to the next neuron's membrane. 
B)  The neurons are physically connected, so the action potential continues movement. 
C)  Calcium ions diffuse across the synapse. 
D)  Neurotransmitter molecules diffuse across the synapse. 
A)  Sodium ions jump across to the next neuron's membrane. 
B)  The neurons are physically connected, so the action potential continues movement. 
C)  Calcium ions diffuse across the synapse. 
D)  Neurotransmitter molecules diffuse across the synapse.

Question 16

The autonomic nervous system is a part of the:

Accepted Answer

A)  central nervous system. 
B)  somatic nervous system. 
C)  peripheral nervous system. 
D)  appendicular nervous system. 
A)  central nervous system. 
B)  somatic nervous system. 
C)  peripheral nervous system. 
D)  appendicular nervous system.

Question 17

The cells of the nervous system that transmit nervous system messages are the:

Accepted Answer

A)  glial cells. 
B)  dendrites. 
C)  synapses. 
D)  neurons. 
A)  glial cells. 
B)  dendrites. 
C)  synapses. 
D)  neurons.

Question 18

Axons of motor neurons first leave the spinal cord through the:

Accepted Answer

A)  spinal nerve. 
B)  ventral roots. 
C)  dorsal roots. 
D)  dorsal root ganglion. 
A)  spinal nerve. 
B)  ventral roots. 
C)  dorsal roots. 
D)  dorsal root ganglion.

Question 19

Spinal nerves emerging from the spinal cord are named for:

Accepted Answer

A)  their basic function. 
B)  the organ they supply. 
C)  the portion of the vertebral column around them. 
D)  strictly the number sequence 1-30. 
A)  their basic function. 
B)  the organ they supply. 
C)  the portion of the vertebral column around them. 
D)  strictly the number sequence 1-30.

Question 20

Cells in the central nervous system that are important for functions such as memory are the:

Accepted Answer

A)  interneurons. 
B)  sensory neurons. 
C)  motor neurons. 
D)  glial cells. 
A)  interneurons. 
B)  sensory neurons. 
C)  motor neurons. 
D)  glial cells.

Exam 27: Communication and Control 1: the Nervous System

An organ or group of cells that responds to a motor neuron is a/an:

A section of a neuron's membrane becomes temporarily positive on the inside when:

In a reflex such as the "knee jerk" or patellar reflex, the efferent signal travels through the:

When a neuron is at its "resting potential," which of the following is true about the concentration of sodium ions?

The portion of the nervous system that most directly controls skeletal muscles is the:

The parts of the central nervous system are the:

Which of the following does the central nervous system use for the action of pulling your hand away from a hot object?

Any collection of nerve cell bodies in the PNS is called a:

Which of the following would send a signal to the central nervous system that you had touched a hot object?

Part of the reason for the charge difference inside and outside a neuron's membrane is:

Inrushing sodium ions trigger the opening of nearby channels and movement of sodium inward at that neighboring section of the membrane. What is occurring?

Nerves would be best described as:

White matter areas of the nervous system mostly contain:

A drug that causes potassium to leak out of the neuron would:

Which statement best describes how one neuron stimulates another?

The autonomic nervous system is a part of the:

The cells of the nervous system that transmit nervous system messages are the:

Axons of motor neurons first leave the spinal cord through the:

Spinal nerves emerging from the spinal cord are named for:

Cells in the central nervous system that are important for functions such as memory are the:

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Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

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Fungi : the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

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An Interactive Living World 3: Ecosystems and Biomes

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